Transcript for What It's Like Searching for the Missing Malaysia Airlines Flight 370 Plane.

As David said, it is a daunting global search, from deep under the water, to the surface of the ocean, stretching out to the horizon. And ABC's Gloria Riviera, tonight, from a search plane over the Indian ocean. Reporter: Today, we joined the hunt for the phantom plane. We boarded a p3 Orion, with the grey knight squadron from the Navy's 7th fleet out of Washington state. A ten-hour journey over the turquoise blue waters. This mission, taking us west of Indonesia, covering 54,000-square nautical miles. The plane, dropping below 500 feet, close to the ocean's surface, any time the pilot sees something to investigate. The aircraft can detect sound 1,000 feet down in the ocean. Even the faint beep from a black box. But today, the p3 focused on finding physical signs of flight 370. At night, using infrared to scan the ocean surface. During light, powerful cameras. This is one example of the kind of technology that makes this aircraft able to do such an exhaustive search. Cameras around the plane, acting like eyes. But they have the ability to do an extreme zoom in on anything that might be part of flight 370. That could be anything, from luggage, to plane debris, even oil. Tonight, above the water, it feels like an inch-by-inch search. Gloria Riviera, ABC news, above the Indian ocean.

This transcript has been automatically generated and may not be 100% accurate.

{"id":22949081,"title":"What It's Like Searching for the Missing Malaysia Airlines Flight 370 Plane.","duration":"3:00","description":"Go aboard a U.S. Navy plane on the hunt.","url":"/WNT/video/searching-missing-malaysia-airlines-flight-370-plane-22949081","section":"WNT","mediaType":"default"}